1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alecsey [184]
3 years ago
15

Suppose you left your lawn mower out all winter, and it is very rusty. Of your 250,000J of work, only 100,000J go towards cuttin

g the lawn. What is the efficiency of the lawn mower now?
A 40%
B 0.4%
C 0.04%
D 4%

REMINDER: PLEASE SHOW YOUR WORK!!!
Physics
1 answer:
mihalych1998 [28]3 years ago
7 0
Efficiency  = 

                 (useful work you get out of it) / (work you put into it)

           =        (100,000 J)  /  (250,000 J) 

           =            0.4  =  40%    (choice-A)


You might be interested in
Magnets are created due to the uniform motion of
Alinara [238K]
<span>Magnets are created due to the uniform motion of "Electrons"

Hope this helps!</span>
7 0
3 years ago
Read 2 more answers
6. How would the measurements for potential difference and current change if a 200 Ω resistor was used in Circuit 1 instead of t
Maksim231197 [3]

Answer:

Explanation:

Resistance is defined as the opposition to the flow of an electric current in a circuit. This means that a higher amount of resistance tends to reduce the amount of current flowing through the resistance. The lower the current, the greater the possibility for the resistor to allow current to pass through it.  if a 200 Ω resistor was used in Circuit 1 instead of the 100 Ω resistor, then the current in the circuit will tends to increase since we are replacing the load with a lesser resistor and a smaller resistance tends to allow more current to flow through it

For the potential difference, a decrease in the resistance value will onl decrease the potential difference flowing in the circuit according to ohm's law. According to the law the pd in a circuit is directly proportional to the current which means an increase in the resistance value will cause an increase in the corresponding pd and vice versa.

7 0
3 years ago
What’s the most distant object in the solar system
Scrat [10]

Answer:

pluto

Explanation:

i had the same question

7 0
3 years ago
Read 2 more answers
What is one property of a wave that determines how much it will diffract when it encounters an obstacle?
Liono4ka [1.6K]
The wavelength of a wave determines how much it will  diffract when it encounters an obstacle

5 0
3 years ago
Study the concentration amount shown on the juice label. Then answer the question. If you had 100 mL of juice, how many millilit
umka21 [38]
The answer is 25 ml for this question
8 0
4 years ago
Other questions:
  • What is loudness?
    14·2 answers
  • A standard quantity of a physical property used as a factor to compare other occurring quantities of that property is called a(n
    9·1 answer
  • Calculate the mass of a 0.9 m^3 block of a material having a density of 12500 kg/m^3.
    6·1 answer
  • Sammy is talking to Sally. Position A is a position in front of Sammy's mouth. Position B is a position in front of Sally's ear.
    8·1 answer
  • A softball with a mass of 0.11 kg goes moves at a speed of 12 m/s, then the ball is hit by a bat and rebounds in the opposite di
    7·1 answer
  • The density of a certain planet varies with radial distance as: rho(r)= rho0(1-αr/R0) where R0= 25.12 x 10^6 m is the radius of
    13·1 answer
  • O-18, an isotope of oxygen, has a stable nucleus. O-19, another isotope of oxygen, does not have a stable nucleus. Based on this
    7·2 answers
  • A rowboat passenger uses an oar to push the boat off the dock by exerting a force of 40N for 3.0s. What impulse acts on the boat
    9·1 answer
  • Compare the de Broglie wavelength of an electron moving at 1.30×107 miles per hour (5.81×106 m/s) to that of a bullet moving at
    9·1 answer
  • 3. In what circumstance will a flash of lightning travel through the sky and<br> touch the ground?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!